Set top box



FIG. 1 is a perspective view of a set top box showing Applicants' new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is one side elevational view thereof;

FIG. 7 is another side elevational view thereof; and,

FIG. 8 is a rear elevational view thereof.

Items shown in phantom lines are for the background purposes only and do not form a part of the invention. 

The ornamental design for a set top box, as shown and described. 